object converted automatically with toString()

Issue type:

[X] question [ ] bug report [ ] feature request [ ] documentation issue

Database system/driver:

[ ] cordova [ ] mongodb [ ] mssql [ ] mysql / mariadb [ ] oracle [ ] postgres [ ] cockroachdb [ ] sqlite [ ] sqljs [X] react-native [ ] expo

TypeORM version:

[x] latest [ ] @next [ ] 0.x.x (or put your version here)

Steps to reproduce or a small repository showing the problem: I have item data with LatLng coordinate pairs stored in a column, and it comes back from my API in JSON format: item: {id: 3, latlngs: {lat: 123, lng: 456}

I have tried to use the @BeforeInsert() method to convert the column data with JSON.stringify(latlngs) but this isn’t being processed accordingly, and i keep getting the yellowbox.js error in the console with the message:

addStatement - parameter of type <object> converted to string using toString()

I had this working before by manually extracting the item data via a flatMap()and transforming each individual item’s latlng via JS via JSON.stringify() but I am unsure how to inject this behavior when I am doing cascading inserts for these entities.

any guidance/help would be greatly appreciated! this ORM is fantastic and I am enjoying and greatly benefiting from using it thus far, thank you to all the maintainers and developers on this project!

[silentroach]

  @Column({
    type: "varchar",
    nullable: true,
    transformer: {
      // used to deserialize your data from db field value
      from(val: string) {
        return JSON.parse(val);
      },
      // used to serialize your data to db field
      to(val: object) {
        return JSON.stringify(val);
      }
    }
  })
  latlngs: object;

[csdal]

(a comment for future references, who searched for this error)

In react-native-sqlite-storage: ^6.0.1, I experience this:

 WARN  addStatement - parameter of type <object> converted to string using toString()

Solved by this:

values.toString()

Example code (Solution):

const addOne = async (db, {firstName, lastName})=>{
  const values = [firstName, lastName].toString(); // 👈👈 add .toString() after array-based values
  const statement = `INSERT INTO tableName (firstName, lastName) VALUES (?,?)`;
  await db.execute(statement, values);
}